Below is a list of Haddam CT zip codes. For your research we have also included Haddam Area Code, Time Zone, UTC and the local Middlesex County FIPS Code. Each Haddam Connecticut zip code has a center Longitude / Latitude point (the Haddam center is -72.512298583984 / 41.477298736572). For your convenience we have also indicated if that zip code in Haddam observes Daylight Savings time.